class_docstr: Base class for estimators
  
  Ensure proper initialization of Mixins.
docstr: Fitted status
docstr_tok: ["Fitted","status"]
code: def __fitted__(self):
      """Fitted status"""
      if not self._backend:
          return False
      return self._check_static_params()
  
imports: from ..parallel import Layer, make_group
  from ..parallel.base import ParamMixin
  from ..parallel.wrapper import EstimatorMixin
  from ..parallel._base_functions import check_stack
  from ..externals.sklearn.base import BaseEstimator
  from ..externals.sklearn.base import clone
label_desc: Use image node_id 2 for calling the BaseEstimator obj's underlying member method code with example usage: obj.__fitted__() and returns: self, False